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<FONT color="green">001</FONT>    package net.jmatrix.eproperties;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import java.util.*;<a name="line.3"></a>
<FONT color="green">004</FONT>    <a name="line.4"></a>
<FONT color="green">005</FONT>    /**<a name="line.5"></a>
<FONT color="green">006</FONT>     * Represents a key in the EProperties class.  Key's behave like strings<a name="line.6"></a>
<FONT color="green">007</FONT>     * in hashtables and vectors, but they have extended attributes <a name="line.7"></a>
<FONT color="green">008</FONT>     * useful for maintaining properties files, and notifying property <a name="line.8"></a>
<FONT color="green">009</FONT>     * observers.<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     * @author Paul Bemowski<a name="line.11"></a>
<FONT color="green">012</FONT>     */<a name="line.12"></a>
<FONT color="green">013</FONT>    public class Key<a name="line.13"></a>
<FONT color="green">014</FONT>    {<a name="line.14"></a>
<FONT color="green">015</FONT>       String comments=null;<a name="line.15"></a>
<FONT color="green">016</FONT>       String key=null;<a name="line.16"></a>
<FONT color="green">017</FONT>    <a name="line.17"></a>
<FONT color="green">018</FONT>       List&lt;PropertyListener&gt; listeners=null;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>       /** If a property is transient, it is not stored back to the data file. */<a name="line.20"></a>
<FONT color="green">021</FONT>       boolean tranzient=false;<a name="line.21"></a>
<FONT color="green">022</FONT>       <a name="line.22"></a>
<FONT color="green">023</FONT>       /**<a name="line.23"></a>
<FONT color="green">024</FONT>        *<a name="line.24"></a>
<FONT color="green">025</FONT>        */<a name="line.25"></a>
<FONT color="green">026</FONT>       public Key(String k, String c) {<a name="line.26"></a>
<FONT color="green">027</FONT>          if (k == null)<a name="line.27"></a>
<FONT color="green">028</FONT>             throw new Error ("null key");<a name="line.28"></a>
<FONT color="green">029</FONT>          key=k;<a name="line.29"></a>
<FONT color="green">030</FONT>          <a name="line.30"></a>
<FONT color="green">031</FONT>          setComments(c);<a name="line.31"></a>
<FONT color="green">032</FONT>       }<a name="line.32"></a>
<FONT color="green">033</FONT>    <a name="line.33"></a>
<FONT color="green">034</FONT>       /**<a name="line.34"></a>
<FONT color="green">035</FONT>        *<a name="line.35"></a>
<FONT color="green">036</FONT>        */<a name="line.36"></a>
<FONT color="green">037</FONT>       public Key(String k) {<a name="line.37"></a>
<FONT color="green">038</FONT>          this(k, null);<a name="line.38"></a>
<FONT color="green">039</FONT>       }<a name="line.39"></a>
<FONT color="green">040</FONT>       <a name="line.40"></a>
<FONT color="green">041</FONT>       public String getComments() {<a name="line.41"></a>
<FONT color="green">042</FONT>          return comments;<a name="line.42"></a>
<FONT color="green">043</FONT>       }<a name="line.43"></a>
<FONT color="green">044</FONT>       <a name="line.44"></a>
<FONT color="green">045</FONT>       /** */<a name="line.45"></a>
<FONT color="green">046</FONT>       public String keyString()<a name="line.46"></a>
<FONT color="green">047</FONT>       {<a name="line.47"></a>
<FONT color="green">048</FONT>          if (comments != null) {<a name="line.48"></a>
<FONT color="green">049</FONT>             String commentString=comments.toString();<a name="line.49"></a>
<FONT color="green">050</FONT>             if (!commentString.endsWith("\n"))<a name="line.50"></a>
<FONT color="green">051</FONT>                commentString=commentString+"\n";<a name="line.51"></a>
<FONT color="green">052</FONT>    <a name="line.52"></a>
<FONT color="green">053</FONT>             return commentString+key;<a name="line.53"></a>
<FONT color="green">054</FONT>          }<a name="line.54"></a>
<FONT color="green">055</FONT>          else <a name="line.55"></a>
<FONT color="green">056</FONT>             return key;<a name="line.56"></a>
<FONT color="green">057</FONT>       }<a name="line.57"></a>
<FONT color="green">058</FONT>    <a name="line.58"></a>
<FONT color="green">059</FONT>       /** */<a name="line.59"></a>
<FONT color="green">060</FONT>       public void setComments(String com) {<a name="line.60"></a>
<FONT color="green">061</FONT>          if (com != null) {<a name="line.61"></a>
<FONT color="green">062</FONT>             com=com.trim();<a name="line.62"></a>
<FONT color="green">063</FONT>             if (com.length() == 0)<a name="line.63"></a>
<FONT color="green">064</FONT>                return;<a name="line.64"></a>
<FONT color="green">065</FONT>             else<a name="line.65"></a>
<FONT color="green">066</FONT>                comments=com.trim()+"\n";<a name="line.66"></a>
<FONT color="green">067</FONT>          }<a name="line.67"></a>
<FONT color="green">068</FONT>       }<a name="line.68"></a>
<FONT color="green">069</FONT>       <a name="line.69"></a>
<FONT color="green">070</FONT>       /** */<a name="line.70"></a>
<FONT color="green">071</FONT>       public String toString() {<a name="line.71"></a>
<FONT color="green">072</FONT>          return key;<a name="line.72"></a>
<FONT color="green">073</FONT>       }<a name="line.73"></a>
<FONT color="green">074</FONT>    <a name="line.74"></a>
<FONT color="green">075</FONT>       /**<a name="line.75"></a>
<FONT color="green">076</FONT>        *<a name="line.76"></a>
<FONT color="green">077</FONT>        */<a name="line.77"></a>
<FONT color="green">078</FONT>       public int hashCode() {<a name="line.78"></a>
<FONT color="green">079</FONT>          return key.hashCode();<a name="line.79"></a>
<FONT color="green">080</FONT>       }<a name="line.80"></a>
<FONT color="green">081</FONT>    <a name="line.81"></a>
<FONT color="green">082</FONT>       /**<a name="line.82"></a>
<FONT color="green">083</FONT>        *<a name="line.83"></a>
<FONT color="green">084</FONT>        */<a name="line.84"></a>
<FONT color="green">085</FONT>       public boolean equals(Object obj)<a name="line.85"></a>
<FONT color="green">086</FONT>       {<a name="line.86"></a>
<FONT color="green">087</FONT>          String type="unk";<a name="line.87"></a>
<FONT color="green">088</FONT>          boolean ret=false;<a name="line.88"></a>
<FONT color="green">089</FONT>          if (obj instanceof String) {<a name="line.89"></a>
<FONT color="green">090</FONT>             type="String";<a name="line.90"></a>
<FONT color="green">091</FONT>             String s=(String)obj;<a name="line.91"></a>
<FONT color="green">092</FONT>             if (s.equals(key))<a name="line.92"></a>
<FONT color="green">093</FONT>                ret=true;<a name="line.93"></a>
<FONT color="green">094</FONT>             else <a name="line.94"></a>
<FONT color="green">095</FONT>                ret=false;<a name="line.95"></a>
<FONT color="green">096</FONT>          } else if (obj instanceof Key) {<a name="line.96"></a>
<FONT color="green">097</FONT>             type="key";<a name="line.97"></a>
<FONT color="green">098</FONT>             Key k=(Key)obj;<a name="line.98"></a>
<FONT color="green">099</FONT>             if (k.key.equals(key))<a name="line.99"></a>
<FONT color="green">100</FONT>                ret=true;<a name="line.100"></a>
<FONT color="green">101</FONT>             else<a name="line.101"></a>
<FONT color="green">102</FONT>                ret=false;<a name="line.102"></a>
<FONT color="green">103</FONT>          }<a name="line.103"></a>
<FONT color="green">104</FONT>          else<a name="line.104"></a>
<FONT color="green">105</FONT>             ret=false;<a name="line.105"></a>
<FONT color="green">106</FONT>          <a name="line.106"></a>
<FONT color="green">107</FONT>          //System.out.println ("Key("+key+") == "+obj.toString()+" type="+type+" ? "+ret);<a name="line.107"></a>
<FONT color="green">108</FONT>          return ret;<a name="line.108"></a>
<FONT color="green">109</FONT>       }<a name="line.109"></a>
<FONT color="green">110</FONT>    <a name="line.110"></a>
<FONT color="green">111</FONT>       /**  */<a name="line.111"></a>
<FONT color="green">112</FONT>       public boolean isTransient() {return tranzient;}<a name="line.112"></a>
<FONT color="green">113</FONT>    <a name="line.113"></a>
<FONT color="green">114</FONT>       /** */<a name="line.114"></a>
<FONT color="green">115</FONT>       public void setTransient(boolean b) {tranzient=b;}<a name="line.115"></a>
<FONT color="green">116</FONT>    <a name="line.116"></a>
<FONT color="green">117</FONT>       /** */<a name="line.117"></a>
<FONT color="green">118</FONT>       void addListener(PropertyListener obs) {<a name="line.118"></a>
<FONT color="green">119</FONT>          if (listeners == null)<a name="line.119"></a>
<FONT color="green">120</FONT>             listeners=new ArrayList&lt;PropertyListener&gt;();<a name="line.120"></a>
<FONT color="green">121</FONT>          listeners.remove(obs); // prevent duplicates<a name="line.121"></a>
<FONT color="green">122</FONT>          listeners.add(obs);<a name="line.122"></a>
<FONT color="green">123</FONT>       }<a name="line.123"></a>
<FONT color="green">124</FONT>    <a name="line.124"></a>
<FONT color="green">125</FONT>       /**<a name="line.125"></a>
<FONT color="green">126</FONT>        *<a name="line.126"></a>
<FONT color="green">127</FONT>        */<a name="line.127"></a>
<FONT color="green">128</FONT>       void removeListener(PropertyListener obs) {<a name="line.128"></a>
<FONT color="green">129</FONT>          if (listeners == null) return;<a name="line.129"></a>
<FONT color="green">130</FONT>          else<a name="line.130"></a>
<FONT color="green">131</FONT>             listeners.remove(obs);<a name="line.131"></a>
<FONT color="green">132</FONT>       }<a name="line.132"></a>
<FONT color="green">133</FONT>    <a name="line.133"></a>
<FONT color="green">134</FONT>       /**<a name="line.134"></a>
<FONT color="green">135</FONT>        *<a name="line.135"></a>
<FONT color="green">136</FONT>        */<a name="line.136"></a>
<FONT color="green">137</FONT>       void notifyListeners(Object value) {<a name="line.137"></a>
<FONT color="green">138</FONT>          if (listeners == null) return;  <a name="line.138"></a>
<FONT color="green">139</FONT>          <a name="line.139"></a>
<FONT color="green">140</FONT>          // generate the event<a name="line.140"></a>
<FONT color="green">141</FONT>          PropertyChangeEvent evt=new PropertyChangeEvent(this, value);<a name="line.141"></a>
<FONT color="green">142</FONT>    <a name="line.142"></a>
<FONT color="green">143</FONT>          for (int i=0; i&lt;listeners.size(); i++) {<a name="line.143"></a>
<FONT color="green">144</FONT>             PropertyListener listener=listeners.get(i);<a name="line.144"></a>
<FONT color="green">145</FONT>             listener.propertyChange(evt);<a name="line.145"></a>
<FONT color="green">146</FONT>          }<a name="line.146"></a>
<FONT color="green">147</FONT>       }<a name="line.147"></a>
<FONT color="green">148</FONT>    }<a name="line.148"></a>




























































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